org.apache.carbondata.datamap.bloom

Class BloomCoarseGrainDataMap

java.lang.Object

org.apache.carbondata.core.datamap.dev.cgdatamap.CoarseGrainDataMap

org.apache.carbondata.datamap.bloom.BloomCoarseGrainDataMap

All Implemented Interfaces:

DataMap<Blocklet>

@InterfaceAudience.Internal
public class BloomCoarseGrainDataMap
extends CoarseGrainDataMap

BloomDataCoarseGrainMap is constructed in blocklet level. For each indexed column, a bloom filter is constructed to indicate whether a value belongs to this blocklet. More information of the index file can be found in the corresponding datamap writer.

Constructor Summary

Constructors

Constructor and Description
BloomCoarseGrainDataMap()

Method Summary

Modifier and Type	Method and Description
void	clear()
void	finish()
void	init(DataMapModel dataMapModel)
void	initIndexColumnConverters(CarbonTable carbonTable, List<CarbonColumn> indexedColumn) init field converters for index columns
boolean	isScanRequired(FilterResolverIntf filterExp)
List<Blocklet>	prune(FilterResolverIntf filterExp, SegmentProperties segmentProperties, List<PartitionSpec> partitions)
void	setFilteredShard(Set<String> filteredShard)

Methods inherited from class org.apache.carbondata.core.datamap.dev.cgdatamap.CoarseGrainDataMap

getNumberOfEntries, getRowCount, getRowCountForEachBlock, prune

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BloomCoarseGrainDataMap

public BloomCoarseGrainDataMap()

Method Detail

init

public void init(DataMapModel dataMapModel)
          throws IOException

Throws:

IOException

setFilteredShard

public void setFilteredShard(Set<String> filteredShard)

initIndexColumnConverters

public void initIndexColumnConverters(CarbonTable carbonTable,
                                      List<CarbonColumn> indexedColumn)

init field converters for index columns

prune

public List<Blocklet> prune(FilterResolverIntf filterExp,
                            SegmentProperties segmentProperties,
                            List<PartitionSpec> partitions)
                     throws IOException

Throws:

IOException

isScanRequired

public boolean isScanRequired(FilterResolverIntf filterExp)

clear

public void clear()

finish

public void finish()